Vaĭnberg, M. M. Variational methods for the study of nonlinear operators. With a chapter on Newton’s method by L.V. Kantorovich and G.P. Akilov. Translated and supplemented by Amiel Feinstein. (English) Zbl 0122.35501 Holden-Day Series in Mathematical Physics. San Francisco-London- Amsterdam: Holden-Day, Inc. x, 323 pp. (1964). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 2 ReviewsCited in 186 Documents MathOverflow Questions: Linearity of the directional derivative of a convex functional at the minimum Question about functional derivatives MSC: 47-02 Research exposition (monographs, survey articles) pertaining to operator theory 47-XX Operator theory Keywords:functional analysis PDF BibTeX XML